i walked along Unter den Linden today, checking up on the souvenir stores.
i'm not sure i found jarkko's particular shop, but i did find a place where they sell the fwtmtwtb items:
bags(20€), cups(5€) and shirts(15-20€).

the shop is located at Unter den Linden, right left (is that correct? - i mean: on the left hand's side of) madame tussauds.

Hi Berliners, I wondered if anyone can tell me whether it is possible to get food/beer inside the venue? We would love to meet up before but our flights arrive late in the afternoon (4.30 at schonefeld) so I do not think this will be possible and am thinking that maybe it would be best to head straight to the venue. Any advice welcome (we are staying at the marriott potsdamer plaza)

Someone asked about a curfew. Actually there is quite a strict curfew at the Waldbuehne. It usually says 22.00 and can be prolonged until 22.30 in some cases. I was at a gig there in June and at 23.00 hours some grim looking officials in dark uniforms stood by the side of the stage and the artist hastily ended his performance. Whereas Berlin is a very liberal pro arts and music oriented city the housing around the Waldbuehne is very posh and the people living there fought for a strict curfew at the city's courts and won.